El Lun 19 Ago 2002 18:24, Michael Martin escribió: > Where am I going wrong? When I did aconnect -i no usb device was shown. > ""Aug 19 17:11:57 linux kernel: ALSA ../alsa-kernel/usb/usbaudio.c:1966: > cannot create a card instance 0"" > > MK-249 USB MIDI keyboard is the Evolution keyboard. > > I see both usb-midi and usbmidi. Could this be because I've got the daemon > installed as well?
No, but you should uninstall it if you are going to use the driver instead the daemon. When you plug in some usb device, the linux-hotplug program tries to find a suitable driver, and then modprobe it. That is what happened: first, hotplug has tried the audio.o module (OSS), but this driver is for digital audio, not MIDI, and cannot work with it: > Aug 19 17:11:56 linux kernel: hub.c: USB new device connect on bus1/2, > assigned device number 6 > Aug 19 17:11:56 linux kernel: usbaudio: device 6 audiocontrol interface 0 > interface 1 MIDIStreaming not supported > Aug 19 17:11:56 linux kernel: usbaudio: device 6 audiocontrol interface 0 > has 0 input and 0 output AudioStreaming interfaces Then, it probed the usb-midi (OSS) driver, that claimed your device succesfully: > Aug 19 17:11:56 linux kernel: usb-midi: Found MIDISTREAMING on dev > 0a4d:008c, iface 1 > Aug 19 17:11:56 linux kernel: usb-midi: Found MIDIStreaming device > corresponding to Release 1.00 of spec. > Aug 19 17:11:56 linux kernel: usb-midi: Found IN Jack 0x01 EMBEDDED > Aug 19 17:11:56 linux kernel: usb-midi: Found IN Jack 0x02 EXTERNAL > Aug 19 17:11:56 linux kernel: usb-midi: Found OUT Jack 0x03 EMBEDDED, 1 > pins Aug 19 17:11:56 linux kernel: usb-midi: Found OUT Jack 0x04 EXTERNAL, > 1 pins Aug 19 17:11:56 linux kernel: string descriptor 0 found (length = 4) > Aug 19 17:11:56 linux kernel: usb-midi: langid(0) 0x0409 > Aug 19 17:11:56 linux kernel: usb-midi: langid(match) 0x0409 > Aug 19 17:11:56 linux kernel: usb-midi: fetchString(2) > Aug 19 17:11:56 linux kernel: usb-midi: fetchString = 24 > Aug 19 17:11:56 linux kernel: usbmidi: found [ MK-249 USB MIDI keyboard ] > (0x0a4d:0x008c), attached: > Aug 19 17:11:56 linux kernel: usbmidi: /dev/midi01: in (ep:81 cid: 0 > bufsiz: 0) out (ep:02 cid: 0 bufsiz:64) At this point, you can use your keyboard with this driver, reading and writing to "/dev/midi01". This is not ALSA, but OSS. After, you tried modprobe snd-usb-audio: > Aug 19 17:11:57 linux kernel: usb.c: registered new driver snd-usb-audio > Aug 19 17:11:57 linux kernel: usbaudio: device 6 audiocontrol interface 0 > interface 1 MIDIStreaming not supported > Aug 19 17:11:57 linux kernel: usbaudio: device 6 audiocontrol interface 0 > has 0 input and 0 output AudioStreaming interfaces > Aug 19 17:11:57 linux kernel: ALSA ../alsa-kernel/usb/usbaudio.c:1966: > cannot create a card instance 0 > Aug 19 17:11:57 linux insmod: Using > /lib/modules/2.4.18-4GB/kernel/sound/usb/snd-usb-audio.o Of course, this module can't find any hardware to work with, and fails. If you do a "lsmod" command, you should see the 'audio' and 'usb-midi' drivers. To unload them: # rmmod audio usb-midi I suggest you to add these modules to the /etc/hotplug/blacklist file: # cat /etc/hotplug/blacklist audio usb-midi snd-usb-audio snd-usb-midi You can see that I include the ALSA modules here. This prevents hotplug from loading them when you plug the keyboard, but this is not a problem if you use the right /etc/modules.conf setup, and the alsasound script. HTH Pedro ------------------------------------------------------- This sf.net email is sponsored by: OSDN - Tired of that same old cell phone? Get a new here for FREE! https://www.inphonic.com/r.asp?r=sourceforge1&refcode1=vs3390 _______________________________________________ Alsa-user mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/alsa-user
